NDLI: Diet and feeding ecology of the diving petrels Pelecanoides georgicus and P. urinatrix at South Georgia

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Polar Biology : Volume 17, Issue 1, January 1997

Diet and feeding ecology of the diving petrels Pelecanoides georgicus and P. urinatrix at South Georgia

Content Provider	Springer Nature Link
Author	Reid, K. Croxall, J. P. Edwards, T. M. Hill, H. J. Prince, P. A.
Copyright Year	1997
Abstract	The diet of the diving petrels Pelecanoides georgicus and P. urinatrix was studied during 1986 (P. georgicus) and 1987 (both species) by lavaging adults as they returned to feed chicks on Bird Island, South Georgia. The diet of both species was dominated by crustaceans, in particular euphausiids (mainly Euphausia superba and some Thysanoessa), which contributed 47–76% of the biomass of crustaceans in the diet of P. georgicus, and copepods, which contributed 71% of the biomass of crustaceans in the diet of P. urinatrix. Calanoides acutus was the most numerous copepod in the diet of both species; however, Rhincalanus gigas was more common in P. urinatrix than in P. georgicus. The dominant amphipod in the diet of P. georgicus, Primno macropa, was absent from the diet of Pelecanoides urinatrix, in which Themisto gaudichaudii (rare in Pelecanoides georgicus) dominated. Dietary differences were maintained in the period (2 weeks of a total of 10 weeks) when both species were simultaneously rearing chicks. Knowledge of the prey species and of the diving abilities and foraging habits of diving petrels suggests that at South Georgia Pelecanoides urinatrix feeds closer inshore and dives deeper than Pelecarnoides georgicus.
Starting Page	17
Ending Page	24
Page Count	8
File Format	PDF
ISSN	07224060
Journal	Polar Biology
Volume Number	17
Issue Number	2
e-ISSN	14322056
Language	English
Publisher	Springer-Verlag
Publisher Date	2014-03-28
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Oceanography Microbiology Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Agricultural and Biological Sciences

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